20111101110205 has 16 divisors (see below), whose sum is σ = 27582412040064. Its totient is φ = 13789732645440.

The previous prime is 20111101110187. The next prime is 20111101110209. The reversal of 20111101110205 is 50201110111102.

It is not a de Polignac number, because 20111101110205 - 2²⁷ = 20110966892477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111101110209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14682702 + ... + 15993871.

It is an arithmetic number, because the mean of its divisors is an integer number (1723900752504).

Almost surely, 2^{20111101110205} is an apocalyptic number.

It is an amenable number.

20111101110205 is a deficient number, since it is larger than the sum of its proper divisors (7471310929859).

20111101110205 is a wasteful number, since it uses less digits than its factorization.

20111101110205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30695316.

The product of its (nonzero) digits is 20, while the sum is 16.

Adding to 20111101110205 its reverse (50201110111102), we get a palindrome (70312211221307).

The spelling of 20111101110205 in words is "twenty trillion, one hundred eleven billion, one hundred one million, one hundred ten thousand, two hundred five".